The Construction of Triads Using Stacked Thirds

Understand triads the right way — by learning how they’re actually built.

This concise, clear, and beginner‑friendly guide walks you through the construction of all four triad types using the essential concept of stacked thirds.

Triads are “the foundational building blocks of harmony in Western music,” and this guide shows you exactly how they work — step by step, with examples, interval formulas, and clear explanations.